OK, I started cubing about 4 months ago, and have really become addicted to it. My sister, who is 21, asked me to start teaching her several weeks ago. She can successfully finish the first layer, but it takes her a long time sometimes and she easily gets frustrated.
I started showing her the middle layer tonight, she had me write down the algorithms for placing middle layer edges and then started asking some questions about how to hold the cube, etc. She placed one using one of the algorithms, and then she had the opposite case, and was trying to describe the way to tell the difference between them, but she was wording it awkwardly and I didn't really understand her. I tried explaining the way I learned to distinguish them, but she got frustrated, yelled at me then left cursing.
My question is, does anyone have an easy way of distinguishing the two cases on this website verbally.
I try showing her, but she gets upset and she wants me to tell her, but my way of describing it doesn't make sense to her. I want her to learn, but I don't want to teach her if she is just going to ***** whenever she doesn't get it immediately. Any ideas?
EDIT: I am thinking about having her learn Petrus instead of LBL, because block building might make more sense than distinguishing multiple cases for the same step, and because the LL algs for the beginner method I showed her are Niklas, Sune, Anti-Sune and Allen (and it's inverse). Do you guys have any experience teaching someone who just has a hard time with it? I have taught a few people before and they have learned in a couple of days with minimal practice, but my sister has been doing it for weeks, with almost no progress.